Mmepụta ihe mejupụtara aluminom sulfate - ihe eji arụ ọrụ, aluminom trihydrate

A na-emepụta aluminom sulfate (Al2(SO4)3), nke a na-akpọkarị alum, dị ka kristal ọcha nke na-anaghị ere ọkụ ma na-agbaze n'ime mmiri. Mmiri kpọrọ nkụ a (Al2(SO4)3.14H2O) bụ 17% Al2O3 ma a na-erekwa ya dị ka mmiri aluminum sulfate nke 47% w/w nke bụ 8% Al2O3. A na-erekwa ya n'ụdị siri ike dị ka kibbled, ala ma ọ bụ uzuzu.

A na-eji aluminom sulfate, Al2(SO4)3, eme ihe nke ukwuu n'ụlọ ọrụ mmepụta ihe. A na-ejikarị ya eme ihe n'ụlọ ọrụ mmepụta ihe na akwụkwọ na n'imepụta mmiri. Mmadụ ejirila aluminom sulfate eme ihe kemgbe afọ 2000 Tupu Kraịst, mgbe ndị Ijipt jiri aluminom mineral dị ka ihe e ji agba agba. A na-eji ya eme ihe ogologo oge n'ịha akwụkwọ iji melite ike na nnabata ink na n'ime ọgwụgwọ mmiri iji mee ka mmiri dị ọcha. Ojiji ndị ọzọ e ji aluminom mee gụnyere ọgwụgwọ mmiri mkpofu, dị ka ihe na-egbochi mmiri na ihe na-eme ka ọ dị ngwa ngwa na simenti, dị ka ihe na-eme ka abụba na mmanụ dị ọcha na ụfụfụ ọkụ.

A na-emepụta alum (dịka a na-akpọkarị aluminom sulfate) n'ime usoro nzọụkwụ abụọ dị mfe site na aluminom trihydrate na sulfuric acid dịka mmeghachi omume ndị a si dị:

2Al(OH)3 + 3H2SO4 + 8H2O → Al2(SO4)3 .14H2O ∆fH = -156 kJ mol-1

Nzọụkwụ mbụ gụnyere ịgwakọta ihe ndị e ji mee ihe n'ime ihe nrụpụta ihe, nke abụọ bụkwa usoro nke ịgwepịa ihe ahụ iji mepụta ụdị dị iche iche nke alum siri ike a na-ere.

Ngwaọrụ

A na-asacha aluminom trihydrate site na bauxite. A na-enweta bauxite azụmaahịa (30-75% Al2O3) na Australia, Jamaica, France, Guyana, Guinea, USA na Brazil. A na-agbaze bauxite ore na soda caustic siri ike iji mepụta sodium aluminate. A na-eme ka aluminom trihydrate ahụ dị na ya site na neutralization (na-abụkarị site na carbon dioxide) ma ọ bụ site na autoprecipitation (usoro Bayer). A na-emepụta ihe ndị ọzọ, sulfuric acid, maka mmepụta superphosphate na Farmers Fertiliser Ltd. Acid na-abịa site na tankị okporo ụzọ ma na-awụba ya n'ime tankị nchekwa.